Excellent series on Self, both the programming model and the tool chain.
I love how opening an inspector on a value (e.g. nil) then shows a link to all occurrences of the value in other open inspectors!

Environment and the programming language Self (part one; environment)
I bring you a message about a language that has been at the birth of many others, but almost no one knows it. A rumor of a graphical environment offering options like no other, but almost no one using it. I also bring information about a virtual machine supporting reflection almost to infinity, reaching almost half of the operating power of C in numerical calculations in its time, yet today forgotten.






